CN113217570A - Automatic safety device for pumping unit - Google Patents
Automatic safety device for pumping unit Download PDFInfo
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- CN113217570A CN113217570A CN202110683904.9A CN202110683904A CN113217570A CN 113217570 A CN113217570 A CN 113217570A CN 202110683904 A CN202110683904 A CN 202110683904A CN 113217570 A CN113217570 A CN 113217570A
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- arm
- brake
- contactor
- driving
- pumping unit
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- 238000005086 pumping Methods 0.000 title claims abstract description 58
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 8
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 230000000007 visual effect Effects 0.000 claims description 7
- 230000006872 improvement Effects 0.000 description 9
- 208000027418 Wounds and injury Diseases 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 208000014674 injury Diseases 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D71/00—Mechanisms for bringing members to rest in a predetermined position
- F16D71/02—Mechanisms for bringing members to rest in a predetermined position comprising auxiliary means for producing the final movement
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
- E21B43/127—Adaptations of walking-beam pump systems
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to an automatic parking safety device of a pumping unit, which comprises a brake hub arranged on an input shaft of a main speed reducer, wherein brake grooves are uniformly distributed on the circumference of the brake hub, a brake arm is arranged on the right side of the brake hub, a brake hook capable of being embedded into the brake grooves is arranged at the upper end of the brake arm, the lower end of the brake arm is hinged on a rotating shaft, the rotating shaft is fixed on a middle shaft end cover of the main speed reducer, and the middle part of the brake arm is connected with a brake operating mechanism. The brake operating mechanism comprises a driving arm and a fixed shell, wherein a driving arm hinge hole is formed in the left end of the driving arm and is connected with a brake arm connecting hole through a driving arm pin shaft; the fixed shell is provided with a fixed shell through hole extending along the left-right direction, the middle of the top wall of the fixed shell through hole is provided with a fixed shell waist-shaped long groove extending along the left-right direction, the right end of the driving arm is inserted into the fixed shell through hole, and the middle of the driving arm is provided with a driving locking block protruding forwards. The device can guarantee timely warning and locking the brake, thereby avoiding accidents.
Description
Technical Field
The invention relates to a beam-pumping unit, in particular to an automatic parking safety device of the beam-pumping unit, belonging to the technical field of safety devices of the beam-pumping unit.
Background
The pumping unit has the requirement of safe operation regulations, and the pumping unit brake must be locked when the pumping unit is maintained and enters a pumping unit bottom plate and the like. At present, after the power is cut off, an operator manually pulls the brake, rotates the brake arm, and embeds the brake hook into the brake groove of the brake hub to realize the shutdown and the brake of the oil pumping machine.
When the operator does not pull or lock the brake according to the rule, or is influenced by underground back pressure and other vibration, the pumping unit can rotate when the load of the pumping unit changes, and the crank or other rotating parts easily bring personal injury accidents to the operator.
Therefore, the pumping unit in the prior art has no alarm to remind when an operator does not operate according to regulations, operates against regulations, stops and does not brake or the brake is not fastened. In addition, under the condition that the brake is not locked manually, the oil pumping unit cannot be powered off automatically and the brake is locked, so that serious personal equipment injury accidents are easily caused, and great potential safety hazards exist.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide an automatic parking safety device of a pumping unit, which can ensure timely alarming and brake locking as long as power is off even if personnel illegal operation occurs, thereby avoiding accidents and improving the safety of the operation of the pumping unit.
In order to solve the technical problem, the automatic parking safety device of the oil pumping unit comprises a brake hub arranged on an input shaft of a main speed reducer, brake grooves are uniformly distributed on the circumference of the brake hub, a brake arm is arranged on the right side of the brake hub, a brake hook capable of being embedded into the brake grooves is arranged at the upper end of the brake arm, the lower end of the brake arm is hinged to a rotating shaft, the rotating shaft is fixed on a middle shaft end cover of the main speed reducer, and the middle part of the brake arm is connected with a brake control mechanism through a brake arm connecting hole.
As an improvement of the invention, the brake operating mechanism comprises a driving arm and a fixed shell, wherein a driving arm hinge hole is formed at the left end of the driving arm and is connected with the brake arm connecting hole through a driving arm pin shaft; the fixed shell is provided with a fixed shell through hole extending along the left-right direction, the middle of the top wall of the fixed shell through hole is provided with a fixed shell waist-shaped long groove extending along the left-right direction, the right end of the driving arm is inserted into the fixed shell through hole, and the middle of the driving arm is provided with a driving locking block protruding forwards.
As a further improvement of the invention, a driving arm central rod extending rightwards is arranged in the center of the right end face of the driving arm, a driving arm spring is sleeved on the periphery of the driving arm central rod, the right end of the driving arm spring is supported on a spring seat, the right end of the driving arm central rod extends out of a central hole of the spring seat, and the outer wall of the spring seat is fixed on the outer wall of the through hole of the fixed shell through a spring seat pin.
As a further improvement of the invention, a slide block is supported at the top of the front side of the fixed shell, a slide block screw hole with an opening at the right end is arranged along the axis of the slide block, a screw rod is screwed in the slide block screw hole, the right end of the screw rod is connected with the output end of a brake gearbox, the input end of the brake gearbox is driven by a direct current motor, the brake gearbox and the direct current motor are fixed on a bottom plate, and the bottom plate is connected with the bottom of the rear side of the fixed shell into a whole; the left end face of the sliding block is connected with a push-pull arm extending leftwards, a push-pull arm kidney-shaped groove extending leftwards and rightwards is formed in the axis of the push-pull arm, and the top of the front side of the driving locking block is embedded into the push-pull arm kidney-shaped groove.
As a further improvement of the invention, a fixed seat is fixed on the upper side of the middle part of the fixed shell, the left end of the fixed seat is fixedly connected with an upright rod extending upwards, the middle section of the upright rod is hinged with a lever through a lever pin shaft, the right end of the lever is hinged with a tension spring, the lower end of the tension spring is hinged with the right end of the fixed seat, the left end of the lever is connected with an insertion rod extending downwards, and the lower end of the insertion rod is inserted into the middle section of the waist-shaped groove of the push-pull arm; the upper end of pole setting is equipped with the electromagnet mounting bracket that extends right, the downside of electromagnet mounting bracket is fixed with the electro-magnet, the electro-magnet is located the right-hand member upside of lever.
As a further improvement of the invention, when the oil pumping unit is powered off: the push-pull arm is positioned at the left limit position, the driving arm is positioned at the left limit position under the tension of the driving arm spring, the driving locking block is positioned at the leftmost end of the push-pull arm kidney-shaped groove, the braking hook of the braking arm is embedded into the braking groove of the brake hub, and the inserted rod is withdrawn upwards and separated from the push-pull arm kidney-shaped groove; when the pumping unit is started: the push-pull arm translates rightwards to pull the driving locking block to the right side, the right end of the driving arm compresses a driving arm spring to store energy, and the left end of the driving arm pulls the upper part of the braking arm to swing rightwards, so that the braking hook is separated from a braking groove of the brake hub, and the brake is released; when the driving locking block reaches the rightmost position, the inserted rod is inserted downwards and blocked at the left side of the driving locking block, then the push-pull arm translates leftwards until the push-pull arm reaches the left limit position, and then the motor of the oil pumping unit is started; when the pumping unit is stopped: the inserted link swings upwards to separate from the waist-shaped groove of the push-pull arm, the driving locking block is ejected leftwards under the tension of the spring of the driving arm to reach the leftmost side of the waist-shaped groove of the push-pull arm, the driving arm synchronously moves leftwards, the braking hook at the upper part of the braking arm is embedded into the braking groove of the brake hub, and the brake hub is braked.
As a further improvement of the present invention, position switches SB1, SB2, and SB3 are mounted on the fixed case, a position switch SB1 detects the leftmost position of the push-pull arm, a position switch SB2 detects the rightmost position of the drive lock block, and a position switch SB3 abuts on the right side of a position switch SB 1.
As a further improvement of the invention, a main contact of a main contactor KC is connected in series in a main loop of the motor M1 of the pumping unit, a control loop of the motor M1 of the pumping unit comprises a stop button TA, a start button QA, a second normally open contact of a position switch SB1, a second normally open contact of a position switch SB2 and a coil of the main contactor KC which are sequentially connected in series, and a first normally open contact KC-1 of the main contactor is connected in parallel with the start button QA.
As a further improvement of the invention, a forward rotation loop of the direct current motor M2 is connected in series with a main contact of a first contactor KM1, and a reverse rotation loop of the direct current motor M2 is connected in series with a main contact of a second contactor KM 2; a normally closed contact of the position switch SB1, a first normally open contact of the position switch SB1, a third normally closed contact KM2-3 of the second contactor and a coil of the first contactor KM1 are sequentially connected in series and then connected between +12V direct-current power supplies, and a first normally open contact KM1-1 of the first contactor and a first normally open contact of the position switch SB1 are connected in parallel;
a normally closed contact of the position switch SB1, a first normally open contact of the position switch SB2, a second normally closed contact KM1-2 of the first contactor and a coil of the second contactor KM2 are sequentially connected in series and then connected between +12V direct-current power supplies, a first normally closed contact KM2-1 of the second contactor is connected in parallel with a normally closed contact of the position switch SB1, and a second normally open contact KM2-2 of the second contactor is connected in parallel with a first normally open contact of the position switch SB 2;
a third normally closed contact KC-3 of the main contactor, a fourth normally open contact KM2-4 of the second contactor and a coil of an intermediate relay KM3 are sequentially connected in series and then connected between a +12V direct-current power supply, and a first normally open contact KM3-1 of the intermediate relay and a fourth normally open contact KM2-4 of the second contactor are connected in parallel;
the fourth normally open contact KC-4 of the main contactor is connected with the coil of the electromagnet in series and then connected between +12V direct-current power supplies, and the second normally open contact KM3-2 of the intermediate relay is connected with the fourth normally open contact KC-4 of the main contactor in parallel.
As a further improvement of the invention, the +12V direct current power supply charges the storage battery through the charging controller, and the second normally closed contact KC-2 of the main contactor and the normally closed contact of the position switch SB3 are connected with the audible and visual alarm in series at two ends of the storage battery.
Compared with the prior art, the invention has the following beneficial effects: when the oil pumping unit is powered off: the slide block and the push-pull arm are positioned at the left limit position; when the pumping unit is started: the brake hook is separated from the brake groove of the brake hub to release the brake. When the pumping unit is stopped: the brake hook is embedded into the brake groove of the brake hub to brake the brake hub. The invention changes manual brake fastening into automatic brake when the vehicle is stopped, thereby avoiding personal injury accidents caused by forgetting operation or illegal operation of personnel. Meanwhile, under the condition of power failure and no brake locking during shutdown, audible and visual alarm is carried out until hidden dangers are eliminated, and an operator is reminded that the operator cannot enter a dangerous area.
Drawings
The invention will be described in further detail with reference to the following drawings and detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.
Fig. 1 is a front view of a brake hub part of a pumping unit.
FIG. 2 is a front view of the first state of the brake operating mechanism of the present invention.
FIG. 3 is a bottom view of the second state of the brake operating mechanism of the present invention.
Fig. 4 is a front view of the stationary housing and the base plate of the present invention.
Fig. 5 is a structural view of a driving arm portion in the present invention.
FIG. 6 is an enlarged view of the electromagnet and plunger of the present invention.
Fig. 7 is an electrical schematic diagram of the main circuit and the control circuit of the motor of the pumping unit.
Fig. 8 is an electrical schematic of the dc motor control system of the present invention.
In the figure: 1. a brake hub; 1a, a brake groove; 2. a brake arm; 2a, a brake hook; 2b, connecting holes of the brake arms; 3. a rotating shaft; 4. a drive arm; 4a, driving a locking block; 4b, driving the central rod of the arm; 4c, driving arm hinge holes; 5. a drive arm spring; 6. a spring seat; 7. a stationary housing; 7a, fixing a waist-shaped long groove of the shell; 8. a slider; 8a, a push-pull arm; 8b, a push-pull arm kidney-shaped groove; 8c, a slide block screw hole; 9. braking the gearbox; 10. a screw; 11. a fixed seat; 12. erecting a rod; 12a, an electromagnet mounting rack; 13. a lever; 13a, inserting a rod; 13b, a lever pin shaft; 14. a tension spring; 15. a base plate; 16. an electromagnet; 17. a charge controller; 18. an audible and visual alarm; m1, a motor of the oil pumping machine; m2, a direct current motor; QA. start the button; TA. stop button; KC. a main contactor; km1. a first contactor; km2. a second contactor; km3. intermediate relay.
Detailed Description
In the following description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not mean that the apparatus must have a specific orientation.
As shown in fig. 1 to 6, the automatic parking safety device of an oil pumping unit of the present invention comprises a brake hub 1 mounted on an input shaft of a main speed reducer, brake grooves 1a are uniformly distributed on the circumference of the brake hub 1, a brake arm 2 is arranged on the right side of the brake hub 1, a brake hook 2a capable of being embedded into the brake grooves 1a is arranged at the upper end of the brake arm 2, and the brake hook 2a is located above the central horizontal plane of the brake hub 1. The lower end of the brake arm 2 is hinged on the rotating shaft 3, the axis of the rotating shaft 3 is positioned below the central horizontal plane of the brake hub 1 and is fixed on the middle shaft end cover of the main speed reducer, and the middle part of the brake arm 2 is connected with the brake operating mechanism through the brake arm connecting hole 2b.
The brake operating mechanism comprises a driving arm 4 and a fixed shell 7, wherein a driving arm hinge hole 4c is formed in the left end of the driving arm 4, and the driving arm hinge hole 4c is connected with the brake arm connecting hole 2b through a driving arm pin shaft; the fixed shell 7 is provided with a fixed shell through hole extending along the left-right direction, the middle part of the top wall of the fixed shell through hole is provided with a fixed shell waist-shaped long groove 7a extending along the left-right direction, the right end of the driving arm 4 is inserted into the fixed shell through hole, and the middle part of the driving arm 4 is provided with a driving locking block 4a protruding forwards.
The center of the right end face of the driving arm 4 is provided with a driving arm center rod 4b extending rightwards, a driving arm spring 5 is sleeved on the periphery of the driving arm center rod 4b, the right end of the driving arm spring 5 is supported on a spring seat 6, the right end of the driving arm center rod 4b extends out of a center hole of the spring seat 6, and the outer wall of the spring seat 6 is fixed on the outer wall of a through hole of the fixed shell through a spring seat pin.
A slide block 8 is supported at the top of the front side of the fixed shell 7, a slide block screw hole 8c with an opening at the right end is arranged along the axis of the slide block 8, a screw rod 10 is screwed in the slide block screw hole 8c, the right end of the screw rod 10 is connected with the output end of a brake gearbox 9, the input end of the brake gearbox 9 is driven by a direct current motor M2, the brake gearbox 9 and a direct current motor M2 are fixed on a bottom plate 15, and the bottom plate 15 is connected with the bottom of the rear side of the fixed shell 7 into a whole; the left end face of the sliding block 8 is connected with a push-pull arm 8a extending leftwards, a push-pull arm kidney-shaped groove 8b extending leftwards and rightwards is formed along the axis of the push-pull arm 8a, and the top of the front side of the driving locking block 4a is embedded in the push-pull arm kidney-shaped groove 8b.
A fixed seat 11 is fixed on the upper side of the middle part of the fixed shell 7, the left end of the fixed seat 11 is fixedly connected with an upright rod 12 extending upwards, the middle section of the upright rod 12 is hinged with a lever 13 through a lever pin shaft 13b, the right end of the lever 13 is hinged with a tension spring 14, the lower end of the tension spring 14 is hinged with the right end of the fixed seat 11, the left end of the lever 13 is connected with an insertion rod 13a extending downwards, and the lower end of the insertion rod 13a is inserted into the middle section of the push-pull arm kidney-shaped groove 8 b; an electromagnet mounting rack 12a extending rightwards is arranged at the upper end of the vertical rod 12, an electromagnet 16 is fixed at the lower side of the electromagnet mounting rack 12a, and the electromagnet 16 is positioned at the upper side of the right end of the lever 13.
When the oil pumping unit is powered off: the push-pull arm 8a is at the left limit position, the driving arm 4 is at the left limit position under the tension of the driving arm spring 5, so that the driving locking block 4a is positioned at the leftmost end of the push-pull arm kidney-shaped groove 8b, the braking hook 2a of the braking arm 2 is embedded into the braking groove 1a of the brake hub 1, and the inserted rod 13a is withdrawn upwards and separated from the push-pull arm kidney-shaped groove 8b.
When the pumping unit is started: the push-pull arm 8a translates rightwards, the driving locking block 4a is pulled to the right side, the right end of the driving arm 4 compresses the driving arm spring 5 to store energy, the left end of the driving arm 4 pulls the upper part of the braking arm 2 to swing rightwards, the braking hook 2a is separated from the braking groove 1a of the brake hub 1, and braking is released; when the driving lock block 4a reaches the rightmost position, the plug rod 13a is inserted and blocked at the left side of the driving lock block 4a, then the push-pull arm 8a translates leftwards until the push-pull arm 8a reaches the left limit position, and then the pumping unit motor M1 is started.
When the pumping unit is stopped: the inserted rod 13a swings upwards to be separated from the push-pull arm kidney-shaped groove 8b, the driving locking block 4a is ejected leftwards under the tension of the driving arm spring 5 to reach the leftmost side of the push-pull arm kidney-shaped groove 8b, the driving arm 4 synchronously moves leftwards in a horizontal moving mode, the braking hook 2a on the upper portion of the braking arm 2 is embedded into the braking groove 1a of the brake hub 1, and the brake hub 1 is braked.
The fixed case 7 is mounted with position switches SB1, SB2, and SB3, the position switch SB1 detects the leftmost position of the push-pull arm 8a, the position switch SB2 detects the rightmost position of the drive lock piece 4a, and the position switch SB3 abuts on the right side of the position switch SB 1.
As shown in fig. 7 and 8, a main contact of a main contactor KC is connected in series in a main circuit of the pumping unit motor M1, a control circuit of the pumping unit motor M1 includes a stop button TA, a start button QA, a second normally open contact of a position switch SB1, a second normally open contact of a position switch SB2, and a coil of the main contactor KC, which are connected in series in sequence, and a first normally open contact KC-1 of the main contactor is connected in parallel with the start button QA.
The forward rotation loop of the direct current motor M2 is connected in series with a main contact of a first contactor KM1, and the reverse rotation loop of the direct current motor M2 is connected in series with a main contact of a second contactor KM 2; the normally closed contact of the position switch SB1, the first normally open contact of the position switch SB1, the third normally closed contact KM2-3 of the second contactor and the coil of the first contactor KM1 are sequentially connected in series and then connected between +12V direct-current power supplies, and the first normally open contact KM1-1 of the first contactor and the first normally open contact of the position switch SB1 are connected in parallel.
The normally closed contact of the position switch SB1, the first normally open contact of the position switch SB2, the second normally closed contact KM1-2 of the first contactor and the coil of the second contactor KM2 are sequentially connected in series and then connected between +12V direct-current power supplies, the first normally closed contact KM2-1 of the second contactor is connected in parallel with the normally closed contact of the position switch SB1, and the second normally open contact KM2-2 of the second contactor is connected in parallel with the first normally open contact of the position switch SB 2.
The third normally closed contact KC-3 of the main contactor, the fourth normally open contact KM2-4 of the second contactor and the coil of the intermediate relay KM3 are sequentially connected in series and then connected between +12V direct-current power supplies, and the first normally open contact KM3-1 of the intermediate relay and the fourth normally open contact KM2-4 of the second contactor are connected in parallel.
The fourth normally open contact KC-4 of the main contactor is connected with the coil of the electromagnet 16 in series and then connected between +12V direct-current power supplies, and the second normally open contact KM3-2 of the intermediate relay is connected with the fourth normally open contact KC-4 of the main contactor in parallel.
The +12V direct current power supply charges the storage battery through the charging controller 17, and the second normally-closed contact KC-2 of the main contactor, the normally-closed contact of the position switch SB3 and the audible and visual alarm 18 are connected in series at two ends of the storage battery.
When the oil pumping unit is powered off: the slide block 8 and the push-pull arm 8a are located at the left limit position, the position of the push-pull arm 8a corresponds to the detection position of the position switch SB1, the tension of the drive arm spring 5 enables the drive lock block 4a to be located at the leftmost end of the push-pull arm kidney-shaped groove 8b, the drive arm 4 is located at the left limit position, the brake hook 2a of the brake arm 2 is embedded into the brake groove 1a of the brake hub 1, at the moment, the coil of the main contactor KC is in a power-off state, the fourth normally-open contact KC-4 is disconnected, the electromagnet 16 is powered off, the right end of the lever 13 swings downwards under the action of the tension spring 14, the insertion rod 13a at the left end of the lever 13 swings upwards and is separated from the push-pull arm kidney-shaped groove 8.
When the pumping unit is started: a switch power supply of a control loop is turned on, a first normally open contact of a position switch SB1 is closed, a normally closed contact of a position switch SB1 is opened, a first normally closed contact KM2-1 of a second contactor is in a closed state, a coil of the first contactor KM1 is electrified, the first normally open contact KM1-1 of the first contactor is attracted and self-protected, a main contact of the first contactor KM1 is closed, a direct current motor M2 rotates forwards, a brake gearbox 9 drives a screw rod 10 to rotate rightwards in a slider screw hole 8c, a slider 8 and a push-pull arm 8a are driven to translate rightwards, a drive lock block 4a embedded in a push-pull arm waist-shaped groove 8b is pulled to the right side, the right end of a drive arm 4 compresses a drive arm spring 5 to store energy, the left end of the drive arm 4 pulls the upper portion of a brake arm 2 to swing rightwards, so that a brake hook 2a is separated from a brake groove 1a of a brake hub 1, and braking is released; the second normally open contact KM1-2 of the first contactor breaks the coil loop of the second contactor KM2, forming an interlock.
When the driving lock block 4a reaches the position switch SB2, the first normally open contact of the position switch SB2 is closed, so that the coil of the second contactor KM2 is electrified, the second normally open contact KM2-2 of the second contactor is attracted and self-protected, the third normally closed contact KM2-3 of the second contactor is disconnected, so that the coil of the first contactor KM1 is electrified, and the direct current motor M2 stops rotating forwards; meanwhile, a fourth normally open contact KM2-4 of the second contactor is closed to enable a coil of an intermediate relay KM3 to be electrified, a first normally open contact KM3-1 of the intermediate relay KM3 is closed to be self-protected, a second normally open contact KM3-2 of the intermediate relay KM3 is closed to enable a coil of the electromagnet 16 to be electrified, suction force is generated, the right end of the lever 13 swings upwards under the suction force of the electromagnet 16 and overcomes the tension force of the tension spring 14, an insertion rod 13a at the left end of the lever 13 swings downwards and is inserted into the middle section of the waist-shaped groove 8b of the push-pull arm to block the left side of the driving locking block 4a.
The main contact of the second contactor KM2 is closed, so that the direct current motor M2 rotates reversely, the brake gearbox 9 drives the screw rod 10 to rotate left in the slide block screw hole 8c, the slide block 8 and the push-pull arm 8a are driven to translate left until the push-pull arm 8a reaches a left limit position, the normally closed contact of the position switch SB1 is disconnected, the first normally closed contact KM2-1 of the second contactor is also in a disconnected state, so that the coil of the second contactor KM2 is powered off, and the direct current motor M2 stops rotating reversely; the drive lock block 4a fitted in the push-pull arm kidney groove 8b stays at the right position as blocked by the plunger 13a.
Only when the push-pull arm 8a is located at the left limit position, the second normally open contact of the position switch SB1 is closed; and meanwhile, when the driving locking block 4a is positioned at the rightmost position, the second normally-open contact of the position switch SB2 is closed, and the coil of the main contactor KC can be electrified, so that the pumping unit is prevented from being started before the braking arm 2 is unlocked, and the safety is ensured. At this time, the start button QA is pressed, the first normally closed contact KC-1 is closed and self-protected, the coil of the main contactor KC is electrified, and the main contact is closed to start the motor M1 of the pumping unit.
When the coil of the main contactor KC is electrified, the third normally-closed contact KC-3 of the main contactor KC is disconnected, so that the coil of the intermediate relay KM3 is electrified, the second normally-open contact KM3-2 of the intermediate relay KM3 is disconnected, but the fourth normally-open contact KC-4 of the main contactor KC is closed, so that the coil of the electromagnet 16 is electrified, and the inserted link 13a is kept in a down-plugging state.
When the pumping unit is stopped: the stop button TA is pressed down to enable the coil of the main contactor KC to lose power, the fourth normally open contact KC-4 is disconnected, the electromagnet 16 loses power, the right end of the lever 13 swings downwards under the action of the tensile force of the tension spring 14, the insertion rod 13a at the left end of the lever 13 swings upwards to be separated from the waist-shaped groove 8b of the push-pull arm, the locking block 4a is driven to pop out leftwards under the tensile force of the driving arm spring 5 to reach the leftmost side of the waist-shaped groove 8b of the push-pull arm, the driving arm 4 synchronously translates leftwards, the upper portion of the braking arm 2 is driven to swing leftwards around the axis of the rotating shaft 3 to enable the braking hook 2a to be embedded into the braking groove 1a of the braking hub 1, and the braking hub 1 is braked.
In the braking process, the second normally closed contact KC-2 of the main contactor KC is in a closed state, and the audible and visual alarm 18 is powered on to give an alarm; if the drive arm spring 5 is caught so that the drive lock piece 4a is not ejected leftward and reaches the position where the position switch SB3 is located, the alarm is not released; the alarm is not released until the normally closed contact of the position switch SB3 is opened when the brake hook 2a of the brake arm 2 has been inserted into the brake groove 1a of the brake hub 1 until the drive lock piece 4a reaches the position of the position switch SB 3.
The invention automatically brakes when the vehicle is stopped, thereby avoiding personal injury accidents caused by forgetting operation or illegal operation of personnel. Meanwhile, under the condition of power failure and no brake locking during shutdown, audible and visual alarm is carried out until hidden dangers are eliminated, and an operator is reminded that the operator cannot enter a dangerous area.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention. Technical features of the present invention which are not described may be implemented by or using the prior art, and will not be described herein.
Claims (10)
1. The utility model provides an automatic machine safety device that parks of beam-pumping unit, is including installing the brake hub on the main speed reducer input shaft, evenly distributed has the braking groove on the circumference of brake hub, the right side of brake hub is equipped with the brake arm, the upper end of brake arm is equipped with the brake hook that can imbed the braking groove, its characterized in that: the lower end of the brake arm is hinged to the rotating shaft, the rotating shaft is fixed to the middle shaft end cover of the main speed reducer, and the middle of the brake arm is connected with the brake operating mechanism through the brake arm connecting hole.
2. The automatic parking safety device of a pumping unit according to claim 1, characterized in that: the brake operating mechanism comprises a driving arm and a fixed shell, wherein a driving arm hinge hole is formed in the left end of the driving arm and is connected with the brake arm connecting hole through a driving arm pin shaft; the fixed shell is provided with a fixed shell through hole extending along the left-right direction, the middle of the top wall of the fixed shell through hole is provided with a fixed shell waist-shaped long groove extending along the left-right direction, the right end of the driving arm is inserted into the fixed shell through hole, and the middle of the driving arm is provided with a driving locking block protruding forwards.
3. The automatic parking safety device of a pumping unit according to claim 2, characterized in that: the center of the right end face of the driving arm is provided with a driving arm center rod extending rightwards, a driving arm spring is sleeved on the periphery of the driving arm center rod, the right end of the driving arm spring is supported on a spring seat, the right end of the driving arm center rod extends out of a center hole of the spring seat, and the outer wall of the spring seat is fixed on the outer wall of the through hole of the fixed shell through a spring seat pin.
4. The automatic parking safety device of a pumping unit according to claim 3, characterized in that: the top of the front side of the fixed shell is supported with a sliding block, a sliding block screw hole with an opening at the right end is arranged along the axis of the sliding block, a screw rod is screwed in the sliding block screw hole, the right end of the screw rod is connected with the output end of a brake gearbox, the input end of the brake gearbox is driven by a direct current motor, the brake gearbox and the direct current motor are fixed on a bottom plate, and the bottom plate is connected with the bottom of the rear side of the fixed shell into a whole; the left end face of the sliding block is connected with a push-pull arm extending leftwards, a push-pull arm kidney-shaped groove extending leftwards and rightwards is formed in the axis of the push-pull arm, and the top of the front side of the driving locking block is embedded into the push-pull arm kidney-shaped groove.
5. The automatic parking safety device of a pumping unit according to claim 4, characterized in that: a fixed seat is fixed on the upper side of the middle part of the fixed shell, an upright rod extending upwards is fixedly connected to the left end of the fixed seat, a lever is hinged to the middle section of the upright rod through a lever pin shaft, a tension spring is hinged to the right end of the lever, the lower end of the tension spring is hinged to the right end of the fixed seat, an insertion rod extending downwards is connected to the left end of the lever, and the lower end of the insertion rod is inserted into the middle section of the waist-shaped groove of the push-pull arm; the upper end of pole setting is equipped with the electromagnet mounting bracket that extends right, the downside of electromagnet mounting bracket is fixed with the electro-magnet, the electro-magnet is located the right-hand member upside of lever.
6. The automatic parking safety device of a pumping unit according to claim 5, wherein when the pumping unit is powered off: the push-pull arm is positioned at the left limit position, the driving arm is positioned at the left limit position under the tension of the driving arm spring, the driving locking block is positioned at the leftmost end of the push-pull arm kidney-shaped groove, the braking hook of the braking arm is embedded into the braking groove of the brake hub, and the inserted rod is withdrawn upwards and separated from the push-pull arm kidney-shaped groove; when the pumping unit is started: the push-pull arm translates rightwards to pull the driving locking block to the right side, the right end of the driving arm compresses a driving arm spring to store energy, and the left end of the driving arm pulls the upper part of the braking arm to swing rightwards, so that the braking hook is separated from a braking groove of the brake hub, and the brake is released; when the driving locking block reaches the rightmost position, the inserted rod is inserted downwards and blocked at the left side of the driving locking block, then the push-pull arm translates leftwards until the push-pull arm reaches the left limit position, and then the motor of the oil pumping unit is started; when the pumping unit is stopped: the inserted link swings upwards to separate from the waist-shaped groove of the push-pull arm, the driving locking block is ejected leftwards under the tension of the spring of the driving arm to reach the leftmost side of the waist-shaped groove of the push-pull arm, the driving arm synchronously moves leftwards, the braking hook at the upper part of the braking arm is embedded into the braking groove of the brake hub, and the brake hub is braked.
7. The automatic parking safety device of a pumping unit according to claim 6, wherein position switches SB1, SB2 and SB3 are installed on the fixed housing, position switch SB1 detects the leftmost position of the push-pull arm, position switch SB2 detects the rightmost position of the driving locking piece, and position switch SB3 abuts on the right side of position switch SB 1.
8. The automatic parking safety device of oil pumping unit according to claim 7, wherein the main contact of the main contactor (KC) is connected in series in the main loop of the motor (M1) of the oil pumping unit, the control loop of the motor (M1) of the oil pumping unit comprises the stop button (TA), the start button (QA), the second normally open contact of the position switch SB1, the second normally open contact of the position switch SB2 and the coil of the main contactor (KC) which are connected in series in sequence, and the first normally open contact (KC-1) of the main contactor is connected in parallel with the start button (QA).
9. The automatic parking safety device of oil pumping unit according to claim 8, wherein the forward loop of the dc motor (M2) is connected in series with the main contact of the first contactor (KM1), and the reverse loop of the dc motor (M2) is connected in series with the main contact of the second contactor (KM 2); a normally closed contact of the position switch SB1, a first normally open contact of the position switch SB1, a third normally closed contact (KM2-3) of the second contactor and a coil of the first contactor (KM1) are sequentially connected in series and then connected between +12V direct-current power supplies, and a first normally open contact (KM1-1) of the first contactor is connected with a first normally open contact of the position switch SB1 in parallel; a normally closed contact of the position switch SB1, a first normally open contact of the position switch SB2, a second normally closed contact (KM1-2) of the first contactor and a coil of the second contactor (KM2) are sequentially connected in series and then connected between +12V direct-current power supplies, a first normally closed contact (KM2-1) of the second contactor is connected in parallel with a normally closed contact of the position switch SB1, and a second normally open contact (KM2-2) of the second contactor is connected in parallel with a first normally open contact of the position switch SB 2; a third normally closed contact (KC-3) of the main contactor, a fourth normally open contact (KM2-4) of the second contactor and a coil of an intermediate relay (KM3) are sequentially connected in series and then connected between +12V direct-current power supplies, and a first normally open contact (KM3-1) of the intermediate relay and a fourth normally open contact (KM2-4) of the second contactor are connected in parallel; and a fourth normally open contact (KC-4) of the main contactor is connected in series with a coil of the electromagnet and then connected between +12V direct current power supplies, and a second normally open contact (KM3-2) of the intermediate relay is connected in parallel with the fourth normally open contact (KC-4) of the main contactor.
10. The automatic parking safety device of a pumping unit according to claim 9, wherein the +12V dc power supply charges the storage battery through the charging controller, and the second normally closed contact (KC-2) of the main contactor and the normally closed contact of the position switch SB3 are connected in series with the audible and visual alarm at both ends of the storage battery.
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| CN202110683904.9A CN113217570B (en) | 2021-06-21 | 2021-06-21 | Automatic safety device for pumping unit |
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| CN202110683904.9A CN113217570B (en) | 2021-06-21 | 2021-06-21 | Automatic safety device for pumping unit |
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|---|---|
| CN113217570B (en) | 2022-10-11 |
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